【英文标准名称】:StandardTestMethodforCrimpandShrinkagePropertiesforTexturedYarnsUsingaDynamicTexturedYarnTester
【原文标准名称】:用动力蓬松纱测量装置测试蓬松纱的卷曲和收缩标准试验方法
【标准号】:ASTMD6774-2002(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D13.58
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:crimp;residualfibershrinkage;texturedyarn;totalcontraction;Totalcontractiontesting;Bulkedcontinuousfilment(BCF);Crimping;Flatyarns;POY(partially-orientedyarn);Residualfibershrinkage;Texturedyarns
【摘要】:TestMethodD6774,fordeterminingmaximumtotalcontraction,crimp,andresidualfibershrinkageintexturedfilamentyarnsissuitableforacceptancetestingofcommercialshipments.Iftherearedifferencesofpracticalsignificancebetweenreportedtestresultsfortwolaboratories(ormore),comparativetestsshouldbeperformedtodetermineifthereisastatisticalbiasbetweenthem,usingcompetentstatisticalassistance.Asaminimum,usethesamplesforsuchacomparativeteststhatareashomogeneousaspossible,drawnfromthesamelotofmaterialasthesamplesthatresultedindisparateresultsduringinitialtestingandrandomlyassignedinequalnumberstoeachlaboratory.Thetestresultsfromthelaboratoriesinvolvedshouldbecomparedusingastatisticaltestforunpaireddata,aprobabilitylevelchosenpriortothetestingseries.Ifabiasisfound,eitheritscausemustbefoundandcorrected,orfuturetestresultsforthatmaterialmustbeadjustedinconsiderationoftheknownbias.Thepropertiesandtheirvariabilityasmeasuredbythismethodrelatetobulkappearance,stretchandrecoveryoffabricsanddyeabilityofyarns.Forsomeyarns,elapsedtimebetweenprocessingandtestinghasamarkedeffectontheresults,ofthistest,especiallyduringthefirst72h.Theeffectiscausedbystressdecaywhichisknowntobeminimalbeyondtheseventhdayandafterwhichtimetheyarnremainsrelativelystable.Therefore,specimensshouldonlybecomparediftestedafterthesameelapsedtime.Samplescanbetestedat-line,thushavinglittletonoelapsedtimebetweenprocessingandtesting.1.1Thistestmethodcoversthedeterminationofcrimpcontraction,residualfibershrinkageandtheirvariabilityofalltypesoffilamentyarns(partiallyorientedyarn(POY),fullyorientedyarn(FOY),flatyarns,texturedandbulkedcontinuousfilament(BCF)carpetyarns)usinganautomatedtester.Note18212;Foranothermethodoftestingcrimpintexturedyarns,refertoTestMethodD4031.1.1.1Thismethodmayalsobeusedfornon-texturedyarns.1.2Thistestmethodislimitedtocrimped,multi-filamentyarnsrangingfrom22.0to890dtex(15to800denier)andforBCFyarnsfrom890to4200dtex(800to3800denier).1.3ThevaluesstatedineitherSIorUScustomaryunitsaretoberegardedseparatelyasstandard.Withinthetext,theU.S.customaryunitsareinparentheses.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththemethod.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W04
【国际标准分类号】:59_080_20
【页数】:6P.;A4
【正文语种】:英语